In a contaminated situation, which items should be donned first?

In a contaminated situation, the priority is to ensure immediate protection of the respiratory system and to prevent inhalation of harmful agents. Therefore, donning the mask and blower unit first is critically important because these items are designed to filter out contaminants from the air, providing an essential barrier to respiratory exposure. Once the breathing apparatus is secured, the individual can then focus on furthering their protection by adding additional items such as a protective suit, gloves, or other equipment necessary for the environment. This sequence helps to ensure that the most vital functions—breathing and air quality—are prioritized above all else, allowing personnel to safely manage their response to a contaminated situation.